Notice of release of Princeton Germplasm of Thurber’s needlegrass

REFERENCES

1. 1. Barkworth ME

   . 1993. North American Stipeae (Gramineae): taxonomic changes and other comments. Phytologia 74:1–25.

   OpenUrl
2. 1. Barkworth ME,
   2. Capels KM,
   3. Long S,
   4. Anderton LK,
   5. Piep MB

   . 2007. Flora of North America north of Mexico. Volume 2, Magnoliophyta: Commelinidae (in part): Poaceae, part 1. New York (NY): Oxford University Press.
3. 1. Cronquist A,
   2. Holmgren AH,
   3. Holmgren NH,
   4. Reveal JL,
   5. Holmgren PK

   . 1977. Intermountain flora: vascular plants of the Intermountain West, U.S.A. Volume 6, The monocotyledons. New York (NY): Columbia University Press.
4. 1. [USDA NRCS] USDA Natural Resources Conservation Service

   . 2015. Oregon annual precipitation. URL: http://www.wrcc.dri.edu/pcpn/prism/or.jpg (accessed 18 Dec 2015).